Furnace arch and block



Mar. 6, 1923.

M. A. HOFFT.

FURNACE ARCH AND BLOCK.

FILED DEC-22,1921.

gnucnfo'o War/(61f. 770/ 6 MQXWW Patented Mar. 6, 1923.

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MAURICE A. HOFFT, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE M. A. HOFFT COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA.

FURNACE ARCH AND BLOCK.

Application filed December 22, 1921.

To all whom it may concern Be it known that I, MAURICE A. HOFFT, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana,,have inventednew and useful Furnace Arches and Blocks, of which the following is a specification.

The object of my invention is to produce a refractory block and a mounting therefor of such character that the blocks may be readily associated into a furnace arch under such conditions that if one of the blocks becomes defective it may be individually readily removed and a substitute block placed in the arch without disturbing the other blocks of the arch.

The accompanying drawings illustrate my invention: Fig. 1 is a longitudinal section of a furnace provided with my improvement; Fig. 2 a vertical section, in the same plane as Fig. 1, on a larger scale, of the block hanging and an adjacent portion of the block; Fig. 3 a perspective view of one of the blocks; and Fig. 4 a perspective view of one of the nose blocks.

In the drawings 1010 indicate pairs of channel irons arranged transversely of the furnace setting with the lower horizontal arms projected toward each other and separated to a suflicient amount for a purpose which will appear.

At suitably spaced points in the length of each channel iron I provide a pivot block 11 to which is pivoted a retainer12 preferably so formed, as by ears 12 which straddle block 11, and an internal surface 13, as to be limited in its upward movement so that it may not swing beyond the vertical plane of the center of its pivot.

The retainers 12 normally lie by gravity upon the lower horizontal arms of channel 10 and their ends are separated by an amount slightly greater than the diameter of a suspension member 14 and somewhat less than the diameter of the head 15 of said suspension member. The retainers 12 are preferably somewhat wider than the diameter of head 15 and in their upper corners are provided with shallow pockets 16 in Fig. 2 for the reception of heads 15 so as to locate the suspension members 14 in proper position lengthwise of the channels.

The suspension member 14 is provided at its lower end with a laterally extending foot Serial No. 524,233.

17 adapted to enter a T-slot 18 formed in the arch block 19.

The arch block 19 is of refractory material and the T-slot 18 formed therein extends only part way into the block, preferably only far enough to permit the axis of the suspension member 14 to be brought into alinement with the center of gravity of the block.

It will be apparent from the above that, in order to form a refractory arch embodying my improvements the blocks 19, being provided with individual suspension members 14, may then be projected upwardly to project head 15 of each suspension member between a pair of retainers 12 until said retainers drop back into position whereupon the block is lowered until head 15 rests in the pocket 16.

In case of desired removal of any block, such block is broken out of the arch, whereupon the operator may raise the exposed suspension member slightly and shift it laterally out of the plane of the retainers 12 and then withdraw it. Thereupon a new block with the old suspension member placed therein may be projected upwardly into the place in the arch, all of this being done without disturbing the other blocks of the arch.

I consider it quite important that the T slot 18 be not extended entirely across or through the refractory block because, by ex tending this slot only far enough in the block to permit the suspension member to be brought into alinement with the center of gravity of the block, I find that the walls of the T-slot are very substantially reinforced by the adjacent unslotted portion of the block and are therefore much less likely to be broken away and the block thereby ren dered unfit for use. It will be noted that with such a construction, even if the walls of the slot, near the open end'of the slot, should be broken down, nevertheless the walls of the slot adjacent the closed end will be practically unbreakable by accidental means because of their anchorage in the adjacent unslottted portion of the block.

The nose block 20 shownin Fig. 4 is of I The suspension bolts for the nose blocks may then be suspended from these fingers.

I claim as my invention:

1. A furnace setting comprising a pivoted retainer yieldably in the direction of the insertion of an arch block, a support therefor, a headed suspension member adapted to be suspended from said retainer, and a refractory block supported by said suspension member, said block having a T-slot in its up per end extending only partly across the face of the block, and the suspension memher having a laterally extending foot arranged in the T-slot.

2. A furnace setting comprising a pivoted retainer yieldably in the direction of the insertion of an arch block, a support therefor, a headed suspension member adapted to be suspended from said retainer,

and a refractory block supported by said suspension member.

3. A furnace setting comprising a pair of cooperating pivoted retainers supported with their free ends toward each other and yieldably in the direction of the insertion of an arch block a headed suspension member adapted to be projected upwardly between said retainers and to be suspended therefrom,

and a refractory block carried by said susan arch block, a headed suspension member adapted to be projected upwardly between said retainers and to be suspended therefrom, and a refractory block carried by said suspension member.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 9th day of December, A. D. one thousand nine hundred and twenty-one.

MAURICE A. HOFF T. 

